DiamondCS Port Explorer 

See which ports belong to which programs! Port Explorer shows all the open ports on your system and what programs own them. Along with this ability it also has many tools including a packet sniffer, bandwidth throttling and country detection.
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Protoport Personal Firewall 

ProtoPort Personal Firewall is powerful security utility that monitors all network traffic. Network packets are passed or blocked according to rules.
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ServersCheck STANDARD Edition 

ServersCheck is a software application for round-the-clock monitoring, reporting and alerting on the availability of systems. It includes real-time HTML reports, graphs and Service Level details. ServersCheck can be administrated through a browser.
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Network Configuration Management 

Switch between network configurations, monitor network bandwidth and ports, etc. Feature: IP Manager, Bandwidth Monitor, Socket to process Mapper, Whois, Asterisk Password Recovery, Task Manager, Process Manager.
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ANSMTP SMTP Component Build 

Powerful, easy- to-use and full-featured SMTP email component enables your ASP, VB, VBA, VC++, C#, VB.NET, JScript.NET, ASP.NET or other COM environment applications to send rich TEXT/HTML email based on SMTP/ESMTP protocol. Support IPv6.
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FreePortScanner 

Free Port Scanner is a small and fast port scanner for the Win32 platform. You can scan ports on fast machines in a few seconds and can perform scan on predefined port ranges.The tool is designed with a user-friendly interface and is easy to use.
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